Sterilizing apparatus.



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I. SGHOBTTL. STERILIZING APPARATUS. APPLICATION Hmm JAN.16,190"1.

Patented Mar. 30, 1909.

4 SHEETS-'SHEET 1.

""Mw'w fj "f" WITNESES:

A, BY*

J; SGHGETTL. y

STERILIZING APPARATUS.

APPJJHATIGN FILED JAN.16,1907.

4 SHEETS-SHEET 2.

f Patented Mar. 3G, 1909.

. SCEOETTL,

STERLIZNG APPARATUS.

APPLICATION FILED Mmmlgov.' f

916,611. K A' Patntea Mar. 3o, 1909.

' .4 BHEETB--SHBET 4.

i wiTNEssEs:

i ci

UNiTED sTATEsigljENT OFFRE.

.JOSEPH scrronirrL, or BROOKLYN, NEW YORK, AssIGNoRor ONE-HALF TO'DAVID FRANK,

OFBROOKLYN, NEW YORK, 'AND ONE-HALF TO JOHN TROUN'STINE, OF NEW YORK, N. Y.

' vs'rnztrrirzme APPARATUS.

t naalden.

Be it'lnown that I, JOSEPH SoHoE'r'rL, a citizen of the United States, and a resident of Brooklyn," in thecounty of Kings and State of New' York, have invented certain new and useful Improvements in Sterilizing Apparatus, of `which the' following is 4a specification.

invention relates to improvements in sterilizing. apparatus, of the character used by. physicians, surgeons and other persons forl the purpose of sterilizing dressings, sur 'cal instruments and other articles, and sai -in- 'vention consists in the novel,features hereinafter described, and particularly pointedvout` 4in the claims. .y Thesterilizer embodying my:v invention comprises asterilizingchamber Vor oven, a water and steam jacket .surrounding the same; a hotair jacket inclosingsaid ing chamber` and water and steam yjacket,la burner for heating the water so. as to generate steam, means for creating a vacuum ywithin. the sterilizing chamber, means for thereafter admitting steam tosaid chamber, means fory v, exhausting the steam from said chamberand,

means for admitting sterilizedl air' to said chamber. The general principle of providing a'stcrilizing chamber with a steam and hot'water jacket, an outer inclosing shell and a burner for heating the water for the purpose of gcnerating the steam tO bc used within the sterilizing chamber is not new, and my invention hars to do.-more particularly with thc'means provided by' me for creatinglv the vacuum within the sterilizing chamber, admitting the steam thereto, exhausting the steam thorerom and delivering sterilized air to said chamber. l Y i One object `of my invention is to simplify the valve operating mechanism connected with thcsterilizer, so that an attendant may rcadilylunderstand how lo accurately utilizo the apparatus, and the correct and thorogh sterilization of the dressings and other articles be positivelyassured. i

A further object of tl ic invention is to pro- Vide means for introduci'nfr sterilized air to the sterilizlng chamber, this boing ythe last step in thn operation of tlienpparat-us, Whereb'y the beneficial o'l'ects to'be secured by the Specification of Letters Patent.l

Application led January 16, 1907. Serial No. 352,499.

Paten-ced March-so, v1909.

ated by the introduction to the sterilizing chamber o f-non-sterilized air as heretofore. The means employed by me for securing the introductiony of sterilized air into' the oven or sterilizing chamber of the apparatus are such that vthey cannotfbc used, eitherintentionally, by neglect or otherwise, in any manner whereby non-sterilized air shall be .admitted to the sterilizing oven-or chamber upon the exhaust of the. steam therefrom. The invention will be fully understood from the detailed description hereinafter presented, reference being had to the aecompanyingdrawings, in which: Figure lis a side elevation, partly broken constructe in accordance with and embody- ,ing the invention; Fi ..2 is' an yenlarged detached diagrammatic v ront `.v ie'Wof ,th e -valve mechanism;constituting? oneportion o the invention, this view showing the vacuum gage ,audits connecting pipe `as lonered `from the sterili'zver, soft-hat .said-gage ,andits pipe may .notconcealthe upper central portions of the f ure; Fig. 3 is a side-elevation of a portion el? sama-.taken from the left hand side of Fig.; -2'and being aitly in section, on the dottedline 3-3Aof ig. 2; Fig. 4 is a detached vert-ical, longitudinal section of a portion of shown in Fig. 3 and is presented to indicate the ejector ocatcd in said ip'e; Fig. 5 lis a central, vertical, longitudinalsection through 'the valve casing' of Fig. 3 With the'rotary ,valve or plug therein; Fig. 6 is a horizontal section of the same on the dotted line 6;-6 of Fig. 5; Fig. 7 is a like view of thc same, with the rotary plug or valvc'turncd to a different position.; F ig. 8 is a 'vertical transverse sec-v tion of the same on the dotted line 8-'8 of Fig. 7; Fig. 9 is a vertical transverse section Fig '10 is a section corresponding nith Fig.

5 but slioningt'he -rotary plug'or valve turned to ,a.differentposition; Fig. 11 is a vertical transverse scetioixof thil same on the '.dqtted'glinc '11---11 oiFig.' l0, andrFigulZis a Vvertical, transverse section of the s vtle dotted line 12-12 of Fig. 10.

whose interior 'constitutes the sterilizing sterilization 'of 'the articles may not be xgitie chpmber oroyen, 2l an encompassing cylin- 'normal position :ofthe same 'when upon' the inthe drawings, 20 designatesa cylinder:

away-fand, y artlyv ,in section, ofva stcrilizer the discharge Vpipe from the valve casing of the sameon the 4dotted'linefQ-w-E) ofFig. 7

amefon der forming between its inner wall and the outer'wall of the cylinder 20 a hot Water and steam chamber, 22 an exterior cylindrical casing encompassing the cylinders 20,21 and forming between its inner wall and the outer wall of the cylinder 21 a hot air chamber, 23 a gas burner for heating the water within the l lower portion of the steam and water chamber 24, and 25 an inlet of known construction for water to said chamber 24. .The lower portion of the exterior casing or cylinder 22 iso enr above the burner 23 so that the heat of't e gas flames ma reach the cylinder 21,

and at its. uppersi e the easing- 22 is pro-- vided with outlets 26 from the upper portion of-the hot air chamber 27. The features hereinbefo're indicated by reference numerals are not new and.v constiA tute general structural features of sterilizers. At--the' front'end ofthe cylinder 2() is "provided a door of iisual construction adapted to be securely locked in its closed position, and the gen eral apparatus is supportediupon a suitabie Frame 28. i 25 My (1) in the valve mechanism, numbered 30, A and piping connected therewith, and (2) in i `the pipe 31, the latter beingutilized, under the manipulation of the valve mechanism 30,V

for introducing sterilized air into the -oven or sterilizing chamber formed by the cylinder 20. The valve mechanism, indicated by 30, comprises a plural-Way valve operated yhy- 'a 4 handle 32 for exhausting air from'and there.-k '35 by creating a vacuum within tlfe oven or sterilizing chamber, thereafter .admitting steam to said chamber, and thereafter exhausting the steam'from said chamber and fcompellmg the I fiow of the sterilized air through the coiled pipe 31 into said chamber,

said air becoming sterilized dur' its passage through 'the pipe 31, which is located within the steam and hot water chamber'24, as shown. i The valve mechanism 30 com rises an exterior ca sing 33, and a rotaryvp ug or valve 34 seated within said casing and operated by means of the handle 32,'whieh is secured upon the front end of the plug 34, while 'the rear end of said plug, which is slightly ta ered, is secured by means of a screw 35 n( washer 36. A t its upper side the casin 33 is provided with threaded sockets 37, 38 res ectivcly (Figs. 5 and 10) to receive the en s of v the pipes 39, 40, as shown in Figs. 1 and 3.

Both pipes 39, 40 serve as outlets from the valve casing 33, the pipe 39 being provided for the passage of air and the pipe 40for the flow of steam, and these pipes 39, 4'0 are connected to each other by a. cou ling member 41 within which is located an ejector 42 (Fig. 4) forsteam. its outer end is connected with the main discharge pipe 43 extending along .the vtop of the 66 sterilizer and open to the atmosphere at its invention resides more particularly The coupling member 41 at,

outer end. When the plu 34 is turned by the handle 32 to effect t e ow of steam through the pipe 40 and ejector 42, said plug will alsoplace the sterilizing chamber or oven 'into communication with the pipe 39, and under this condition the flow lof the steam through the pipe 40 and ejector 42 will compel the air w1 inthe storilizing chamber or oven to exhaust through the pipe 39 and into the main' discharge pipe 43, whereby a vacuum will be created within saidvchamber.

At its op'fposite sides the valve casing 33 is formed wit 6) .to receive the pipesV 46, 47 respective y (Fig. 2'), said pipe 46 being in communica tion with a pipe 48 which, as shown in Fig. 1, extends downwardly intov the dome or upper portion of the steam and water chamber 24, the -pu se of said pipe 48 being to lead the steam om. said c amber to =the pipe 46 which directs it to the valve casing 33, wherethe threaded sockets 44, 45 (F' i in its' course is controlled by means of the i valve plug 34, as hereinafterv explained.y kThe steam-pipe48 also communicates withl the usual steain'pressure ga e 49 and with a pipe 50 leading to thelisua water gage 51. The pi e 47 connected with the socket 45 of the va ve casing 33 is in communication with a pipe 52 (Figs. 1 and 2)which extends downwardly'into the sterilizing chamber or andthen to deliver steam to said chamber or oven, the air exhausted from the 'chamber or ovenbeingconducted by the pipe 47 to the valve `casing 33 andthence yby means of the valv'efplug 34 and said casing to the pipe 39,

pipe 43 by the steam issuing from the ejector 42. The pipe 52is also in communication with a, vacuum gage 53.i i

The valve casing 33 is, as shown in Fig. 5,'

oven and is employed to exhaust air from' l whence the is forced to and 'through the formed with two vertical ports 54, 55 wbich .lead from the chamber tightly inclosing the valve plug-34 and are respectively in com munication-- with the pipes "'39, 40. t The valve casing =33 is also formed with horizonvtal. ports (Fig-6) 56, 57 respectively in corn-- munication Awith the steam pipe 46 and -exhaust(pipe 47. The valve'casing 33 is also forme with a horizontal port 58 which is in communication with the steam"`pipe 46 and is used exclusively (the port 56 at the time being closed) for conducting the steam to the passage 59 leading through the valve plug'34 to the steam-pipe 40 this passage 59 being in action only when it is desired that the steam shall flow through the pipe 40 for the urposc of exhausting from the sterilizing c amber through the pipes 52, 47, 39. The passage 59 comprises a horizontal portion shown in Fig. 6 and a verticalportion shown in Fig. 5, and the vertical portion of the passage 59 is shown in Fig. 5 as being in communication with the port 55 ofthe valve casing, said port 55 leading to the steam-pipe 40.

The valve-plug34 is formed (invertieal hne with the ports 54, 56, 57) with a through transverse'passage 60 (Fig. 8) and a passage 6l which communicates with and is at right angles to the passage 60. The passage 6() ma),r be placed in direct communication with the ports 56, 57, as shown in Fig. 11, and this is the position ofsaid passage when it is desired that steam, in lieu of flowing to 10 the pipe 40, s hall pass directly through the valve casing 33 to the pipesA 47 and 52 and enter the sterilizin'g chamber or oven. In F igs; 5 and 6 I however illustrate the valveplug 34'as it stands at the time steam is flouing to the pipe 40 and air exhausting from the sterilizing chamber orv oven through the pipes' 5 2, 47,39, and at such time the valveplug 3.4:v vwill have its passage 61 in communication with. the'pipe 47 and port 5 7 andits y: passage 60` Vstanding vertically, in communication wit-i .the port ,5ftA and pipe 39,.the valve-plug 34 then. closing the port 56 and holding its steam.passage'-59 in communication .'With' thepor't 58 of the valveeasing. When the valve' plug k34'jis` in the 'osition indraad meri s. 5 and e stamt-.wd swam the'steaman p hot'water chamber 24 through the pipe'48 andpipe 46v t9 thejvalve casing .3.3 and thence through the port `58, passa e 59 flow ofthe 'steam in the direction just/indicated will'causethe air to exhaust from the sterilizing vchamber o1:` oyen up through the pipe 52 andithrough the pipe 47 to the valverv sseasing 33, vrs-'hei'ice the axr'will pass. through valve easing 33 and into the pipes 47, 52,`

whence it will pass into the steriliaing chamber or oven; and when the operatmghandle 32 hasbeentumed to its extreme position to the right for this purpose, the valve-plug 34- ..'ill close vor out olf the ports 58, 54 of the valveeasin and Athe through passage of the valve-p ug Willl'w1 placed4 in direct com- 55 munir-ation with the horizontal ports 56, 57

ofsaill easing, as shown in' Fig. H, under l`fore rldescrxbed, establishing a passage for which condition the steamA will flor: directly from the pipes 48, 46 through the valve easiiigand valve-plug and intdthe pipes'47, 52,

6o being. conducted'thereby vto thesterilizing;

eine mbar or oven,

Aftelithe steam has been 4adlniltod-.for a,

sulii'gi'e'ritlength of time t'ofthe storilizing r-haniber or oven 'the valve-plug 34 may be to an 'intermediate position, shown in Fig. 8, in which it may be observed that the passages through the plug are not in communication with any of the passages through the valve casing, this boing tho closed position of the valve, since no steam is then passing through it and no exhaust cantako place through it. When it is desired to again exhaust from the storilizingchamber or oven the valve-plug 34 sill be restored to itspolsition shown in Figs. 5 and 6, so that the 75 steam may flo'w to and. out from the ejector pipe 40 and compel an exhaust through the t pipe 39.

I provide upon the front of the valve-cas ing 33 an index-plate 62 across which the op- 80 erating handle 32 may bemoved, and I secure upon thestem of the valve-plug a finger 63 whose outer pointed end is close to the -face of theplate 62. At one side of the plate 62 is provided astop pin 64 (Fig. 2) near 85 which are the wol-(s Outlet vaeuum.

When the handle 32 is moved until the end of 4the vfinger 63 contacts with tlie 'pin 64, the valve plu 'will be in the position shown in 6, 'allowing the steam to reach the 90 pipe 40 and the vacuum to be created within the sterilizinv chamber through the pipe 39. Nearthe right hand edeof the plate 62 I provideastop in 65, an .upon the )late the word Cham er. is placed. Wlien the handlel 32`isturne`d to the right until the linger 63 engages the stop iin 65 the valve-plug will bein the position s lown in Figs. 10 and .11, steam at such time being admitted to the sterilizing chamberor oven and the pipes 39, 40 being cut o'. When the bant. le 32 is moved to theintermediate position shown in Fig; 2, the finger 63 will point to the word Closed, and at such time the valve-plug 34- will be in the position shown in Fig. S, Awith all of its passages cut oil from communication with al'l'of the pipes.

In the Aregular operation of the sterilizing apparatus, the door of the sterilizing oven or c iambcr is opened, the dressings or other articles to be sterilized placed within said oven and said door e'losed and locked. Ste-am having'been generated within the water and steam chamber 2,4, the valve operating arm 32 will be moved to the left from its osition 115 shown in Fig12 until the finger 63 )ecornes arrested b the stop 64,.this movement, of said arm aving the effect of turning the valve-plug 34- from its closed position shown in Fig. '8 .to the position in w lich it is illus- 120 trated in Figs. 5 and 6, thereby, as hereinbesteam from theehambcr 24pipe 4S, pipe 46,l port 5S', passage l59 an d port 55 to the ejector steam-pipe 40, and placing the discharge air 125 pipe .3Q-into communication lwith the inte` rior of l the steriliging chamber or oven through the pipe 52, -ipipe 47, port 57, valvepassage'sGlLO.and port 54.` The valveplug 34,-will-be permitted to remain 1n the 13o ositien just above 'indicated a suitable ength of time to extract the air from Within the sterilizing 'chamber or oven and thereby create a vacuum therein, and thereu on the 5 valve o L eratig arm-32 will be turne to the right, ooking atFig. 2), until the nger 63 becomes arrested by the stop 65, this movement of the said arm turning the valvelug 34 into the position shown in Figs. 10an 11, thereby cutting 'off the pipes 39, 40 and establishing a direct communication from the steam ipes 48, 4,6 through the easing 33, valvep[l)ug 34 and pipes 47, 52 with the sterilizing chamber or oven, the purpose being that the steam shall then flow-into said chamber or oven and act to lsterilize the articles therein. After the flow of steam to the sterilizing chamber or. oven has -continued -for a suitable period, the operator may turn -the handle or arm 32 to its intermediate po'- sition for'restoring the valve-plug 34 to the position shown in Fig. 8, all of its passages then being removed from communication `with all of the pipe connections, or in lieu of thus moving the valve-plug to its closed position, the valve arm 32 may be immediatel f Amoved to its extreme vosition at the le t (looking at 2), there y again placing the ejector steam-pipe 40 into communication with the-steam pipes 48, 46 and the exhaust Apipes 52, 47- into communication with the pipe 39, whereupon the'steain which previ@ g ously was directed to the sterili'zing chamber or oven, will flow through the -pipe and create an exhaust through the pipes 52, l47 and 39, thus extractingthe steam and moisture from said chamber or oven.

U )on the extraction of the steam from the 'sterilizing chamber or' oven, a vacuum is created therein, and vthis vacuum if permitted to continue would prevent the opening of the door to said chamber' or oven and conse- A quently prevent the removal' of the articles that had been' placed ltherein to be sterilized..

s'hould be admitted to the sterilizing cham- -the steam therefrom, but it isA of the gileatest importance thatthe air thus admitted shall which .might yitiate all `lof the beneficial effects sought to be secured by the lstlerilizing operation. In accordance with my invention l therefore provide the coiled pi e 3l tlirough which the 'air to enter the steri izing c :amber or oven passesvand within which the air becomes sterilized by the heat imparted to the sanieffrom Vthe pipe 31, whichI is coiled \vithin tl1e steam and hot water chamber 24 and, as shown in Fig. 1, opens into the sterilizing chamber or oven. The "outer end of, the coiled pipe 31 is disposed .near Athe front end of the appara-tus and is provided with a valve 66 by which the assage through the pipe may be. opene or It is therefore not onlydesirable that air tion of the articlesv assured. ber or oven, after or during the extraction of n ot carry with it' any contaminating germs' closed. The valve 66 in the pipe 31 will normally be -kept'closed but after the ex' traction of the steam from the sterilizing chamber or oven or during such extraction,` the valve 66 will be opened so that the ex- 70 haust created bythe valve mechanism 30 may compel the flow of the air through the coiled pipe 31 and into the sterilizing chamber or oven, said air during its passage 'throigh said pipe becoming heated 4 and ster- 75 The iow of the sterilized air through the pipe 31' into the sterilizing chamber or oven v ma be continued as long 'as may be desired an' will continue so` long as the valveop- -80 eratin arm 32 is ingits extreme position to the le t (looking at Fig. 2). The airilo into the sterilizlng chamber or oven thi-ou the pipe 31 may, under any and all een 'f' l tions, e relied uponto remove the last trace of moisture from the articles within the oven,

from the walls of the oven and'rom thein' teriorof `the piping eonnectedvith the/oven;` f

all of which is of verygreat advantage. .If

the operator should decidete-exhaust all of i: 'I

the steam from the sterilizing chamber or oven before opening the valve 66.of the pipe 31, thereby creating a vacuum in saidlowen, he will thereafteropen the valve 66, witli the valve operatin handle`32 in its extremepo# 95 sition to the le t, so as to compel the 0W of sterilized air through the ipe 3 1`end into the ove linderwhich con 'tion the sterilized air would first relieve the vacuum within the over and thereafter perform its l* 10o fieial eieets above. indicated.

It will be understood from the description hereinbefore presented 'thatf almost theQentire 'olieration of thel steriliipngapparatus is placed under -the control df 'the one'evalve 105 operating arm 3-2, and since this arm may be used in connection with an index-plate I62 for guiding the operator, obviously, the correct operation of the apparatus,- may be readily carried out and the In view of the number of valves com. monly employed on 'sterilizers heretofore, placed in use for sterilizing surgier` instru? ments, dressings and-the like, some 'Hiculty'- 115 has been encountered in assuredly'eieetin i the correct operation of the sterilizer, an this difficulty is overcome b invention" and especially by reason of t e fact that the attendant may by the manipulation of the one handle arm 32 effect and control silb' stantially all of the diierent steps in:the 'op` f eration ofthe apparatus. Air has heretofore' v been introduced to the s'terilizing oven, but in accordance with my invention this A air becomes highly heated and therefore sterilized and of drying and sterilizing value before 'it is permitted to enter the oven, and as hereinbefore indicated, it is of advantage lto be"v ble to continue the ilow of thefheated airY proper steriliza- 11401 been relieved.

through the ovenand through the piping connected therewith and with the -valve mechanism' after the vacuum created Within the oven by the exhaust of the steam has What l claim as my invention and desire to scc-uro by'hetteislatent, is z- 1. A sterilizin oven, asteam c am er and an individual valve mechanism and pipe connections for exhausting air from the oven, tl'ien' delivering steam intothe ovenJand then-exhausting the steam from the oven", said valve mechanism and connections comprising a valve cas.- ing 33 having a port 54 connected with an ex aust pipe 39,' a port 55 connected with 4an outlet steam-pipe 40, a' port 57 connected by piping with the sterilizing oven, two ports 5G, 58 connected by piping with the steam chamber, a rotary )lug valve 3ft' seated within saidcasing an Y having on its exposed end a handle by which the valve `may' be manually set, an index adjacent' to said handle for guidingv the operator in setting'said valvc,'a n ejector 4.2(in saidl steam outlet pipe, means connecting said exhaust pipe and said steam pipetogethe'radjacen f to said ejector, and amain dischargepipe' 43 it for, according to'its position, permitting `the ,-jiowof Asteam to said steam-pipe and leading from said ejector, said valve havin a through transveis'c passage' 60 in line Wit i theahiresaid ports'- 54, 56, 57, a passage l61: in communication with said passngej() and i :it an angle thereto, and a passage 5 9 toc-'onnect said ports 58, when it is desired'to exhaustffroin said oven.; substantially as set- 2. A steriliz/.ing` apparatus comprisingr an oven, a st.camclm1n er, a pipe extending from the outer atmosphere through said steam chamber into said oven and being of appropriate length within said chamberto assure 'the heatiugol the Yair passing through the pipe before its entranceI t-o'said oven, and f valve mechanism and pipe connections forexhausting air from the oven, then delivering steam into the oven and then exhausting the steam from the oven, s'aid valve mechanism and connections comprising a Vvalve casingr 33 having a port 54 connected with an exhaust'pipc-lhi, a port 55 connected withl an outlet steam-pipe 40, a port 57 connected by pipingwith .the steiilizi f oven, twoports 56, 58 connected by piping with the steam chamber, a rotary lug valve 34 seated wil hin said casing and) having 0n its eX- ioscd cnil a handle by which the'valve may )c manually sot, an index adjacent to said handle for `guiding the operator in setting said valve, an ejector 42 in said ste'ain outlet pipe, means connecting` said exhaust pipe and said steam p ipe together adjacent to said ejector, and a main discharge pipe 43 leading from said eject-or, said valve having passages through it for, according to its poap aratus comprising an -connected by sition permitting the flow of steam to'said steam-pipe and placin Vsaid exhaust pipe in communication with t e oven and for cutting oifsaid steam and exhaust pipes and directing' the steam into said oven; substantially as set forth.

3. A sterilizin ap aratus comprising an oven, a st'eam c am er and an 1ndiVidual valve mechanism and pipe connections for exhausting air from the oven, then 'delivering steam into the oven and then exhausting the steam from the oven, said valve mechanism and connections comprising a valve casing 33 having a port 54 connecte pipe 39, a port v55 connected with an outlet steam-pipe 40, a port 57 connected by piping with the sterilizing oven, two ports 56, 58

Ipipin with the steam chambei'2 a rotary ug va ve 34 seated withinsaid casm and iaving `on its exposed lend a hand e by which the vralvemay be manually set, -an' nide'x adjacent to said handle for guiding-'the operator in settingA said valve,

`f iiicjector 42 in said steam outlet pipe, means conncctin said exhaust pipe and said steam pipe toget 1er adjacent to said ejector, and a mainl discharge `pipe 43 leading from said ejector,` said valve having passages through placin said exhaust pipe in communication with t o oven and for cutting otr said steam andexhaust pipes and directing the steam into said oven substantially as set forth.

4. A stei'ilizing apparatus comprisinga' horizontal `oven, an encompassing steam chamber, an air-pipe extending from the open atmosphere through said steam cham` bei' and into said oven for leading air. into the latter and enabling 'the saine' to become heatedon its passage through the pipe by the heat of said steam cham opening and closing. said airpipe,'and valve mechanism and an ejector and ipe connections 4connectingl said valve mec iainsni with said steam chamber and oven for exhausting air from said oven, then .delivering steam from said steainehamber into said oven and with an exhaust.

105 er, a valve for then exhausting the steam from and effecting the flow of the heated air through said airpipi into' said oven; substantially as set 'ort i.-

5. A stei'ilizing apparatus `comprising a horizontal oven, an cncom assin 7 steam charnlwr,v a pipe extending rom the open atmosphere in o said steam chamber Wherein it is coiled ack and forth and thence entcrs said oven 4for lcadingair Ainto the lati tei' and enabling the saine to become heated.

on'its passage through the pipe by theheat ofj said steam chamber, a Valve for opening and closing said air-pi e, and valve mechanism and an ejector an pipe connections oo nnecting said valve .mechanism with said 5 flow of the heated air through said airipe swmhaniber nd oveffor exhaust" ,ir'f- Kings and Sme f New York, this 14th day from said ovkn, hen deliveing stean hm of Janury. AL D. 1907.

said steam c'am er into sai oven an t en 1 exhausting the steam from'snd effecting th'e l 'JOSEPH SCHOMI TL' Witnesses:

` LOUIS B. FUNK,

mtosaid oven; substantially as set fort WM. L. 'SHAUGHNEssY- Signed at Brooklyn, the, county of 

